disjunction


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disjunction

 [dis-junk´shun]
the act or state of being disjoined. In genetics, the moving apart of bivalent chromosomes at the first anaphase of meiosis.

dis·junc·tion

(dis-jŭnk'shŭn),
The normal separation of pairs of chromosomes at the anaphase stage of meiosis I or II.
[dis- + L. junctio, a joining, fr. jungo, pp. junctum, to join]

disjunction

(dĭs-jŭngk′shən)
n.
1. The act of disjoining or the condition of being disjointed.
2. Logic
a. See exclusive disjunction.
b. See inclusive disjunction.
3. Genetics The separation of homologous chromosomes during meiosis.

dis·junc·tion

(dis-jŭngk'shŭn)
The normal separation of pairs of chromosomes at the anaphase stage of meiosis I or II.
The normal separation of pairs of chromosomes at the anaphase stage of meiosis I or II.
[dis- + L. junctio, a joining, fr. jungo, pp. junctum, to join]

disjunction

The separation movement of members of pairs of chromosomes to opposite poles of a cell in the process of cell division.

disjunction

the separation of HOMOLOGOUS CHROMOSOMES to opposite poles during anaphase of nuclear division, particularly MEIOSIS. Abnormalities in disjunction (see NONDISJUNCTION can lead to a chromosomal mutation in which daughter cells possess too many or too few chromosomes. In humans extra AUTOSOMES can result in severely abnormal individuals (see DOWN'S SYNDROME, PATAU SYNDROME, EDWARDS'SYNDROME). See also TURNER'S SYNDROME and KLINEFELTER'S SYNDROME for disjunction abnormalities affecting the SEX CHROMOSOMES.
References in periodicals archive ?
The graphic effect of these disjunctions would also be evident if the switch were to be made at the end of years three and four, though to a lesser extent, since both the WHO and UK centiles begin to converge after 24 months.
These consisted of a number of single event component statements and the three disjunction types LL, LU, and UU.
The set of constraints [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII] (read as `[Gamma] or-cross [Delta]') contains the disjunction of each possible pair of constraints from [Gamma] and [Delta].
The operations and relations between factors, such as equalities, subfactors, conjunctions, disjunctions, independent factors, difference factors, complement factors and atomic factors are dealt with similarly as in the earlier sections.
Then, for every q [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII], it must be that [Delta](q, a) is a disjunction of states in [MATHEMATICAL EXPRESSION NOT REPRODUCIBLE IN ASCII].
This ideal is almost everywhere implied as the standard against which the families portrayed in the novels are evaluated, and herein lies the explanation for the paradox involved in the apparent disjunction between Dickens's reputation as the celebrant of domestic bliss and his fictional interest in fractured families.
We note that for a sum type with two summands we can express the trivial property of this type as a disjunction
We deal here with extensions of such programs by disjunction (and, as well as for Datalog, by negation); the corresponding query languages thus amount to disjunctive Datalog.
Among the topics are negation, alternatives, and negative polar questions in American English; the English It-Cleft: no need to get exhausted; and disjunction and alternatives in Egyptian Arabic.
In particular, disjunction of the pterygomaxillary process combined with conventional SARPE osteotomy may increase the haemorrhagic complication rate depending on the damage to the pterygoid venous plexus (11).
A PROPOSAL FOR A SYNTACTIC SOLUTION OF THE PROBLEMS OF DISJUNCTION IN HUMAN THOUGHT